when hurricane sandy hit this island she plowed through sand dunes and the beach. filling almost all of the streets with mountains of sand. some of that will be used to restore beaches and dunes. yet there is now a debate as to how much of the shoreline can or should be rebuilt. it's estimated to cost $8 million per mile. meanwhile, sea levels are expected to rise and storms intensify as the climate changes and further erodes the country's coasts. >> we're seeing it here. there's no denigh it any longer. >> reporter: jefferson wagner says there's a reason even broad beach money can't buy a solution to its sand problem. >> i think it's starting to finally sink in that it's not going to be an easy task. nobody's willing to give up this asset. this is why people come to the beach. >> reporter: a beach that's narrowed by the day. for "cbs this morning," ben tracy, malibu. >> i love being on the water and i love beaches. so this is a sad story. >> it is a sad story. certainly concerned about the people still struggling from sandy. >>> speaking about people who are strug